I think we may find it has something to do with distribution. Uni will be very keen to let the current deal (with Fox, I think?) lapse as quick as possible, so that they regain full production and marketing control (and the full financial returns too, natch!) and they may well be something in a contract that says Fox either gets distribution rights on any sequels or spin-offs, or at least gets some kind of financial reward from any such films.
They may even have marketing rights or other stipulations in place, meaning this could well be more of a cutting ties decision rather than a creative or even financial consideration. As such, I wouldn't expect to see any sequels from the Fox-era DWA films for similar reasons, though it could be argued that things like Shrek, Dragon and Panda predate that (or were DWA properties in production before that deal) and so could be immune to those kinds of issues.
Sadly, I'm betting that Uni will basically let the remaining Fox films flounder at the box-office with little to no promotional pushes other than what's already in place (although the surprise returns on Trolls might change their minds) and then I would just expect DWA to slowly just become part of Illumination. They already just closed the Indian studio, China may come next (or Oriental DreamWorks will become Oriental Illumination) and then DWA itself will get properly merged, either as Illumination DreamWorks or just plain Illumination.
I bet the DWA name, as a producing studio, is gone in the next five years, definitely in ten. The "brand" may still grace film posters on Shreks 6, 7, 8, etc, but they will all be Illumination films in all but name, and even then I'd argue that they'll swap that too. Sad end for a good studio that should have stuck with Paramount and could have still been a major force. Right now they are bleeding people and it won't be long until the big names start looking for other options.
![Sad :(](./images/smilies/icon_new_frown.png)